Composition of matter comprising resins and rubber in aqueous dispersion and method of making the same



Patented June :10, 1930 UNITED STATES PATENT OFFICE ARTHUR BIDDLE, or rann'ron, NEW JERSEY, assrenon TO UNITED rnonuc'rs 0.0m

PORATION OF AMERICA, A CORPORATION OF DELAWARE comrosrrron or MATTER comrmsme RESINS AND RUBBER m seunousprsrnnsrou 1 AND METHOD or MAKiNG THE sAJuE No Drawing.

This invention relates to a composition having adhesive properties and comprising resins and rubber in aqueous dispersion.

Among the objects of the invention are to provide a surface coating for paper, cloth and fibres; to provide a beater sizing for paper, asbestos or other fibrous materials;

to provide a paint or surface sizing adaptable for use on walls, wood, etc. My composition will also-be found adaptable for use in various other arts. The rubber may be in its natural latex state in which it may, if desired, .be treated with alkalies or other preserving a ents, or an artificial aqueous dispersion 0 natural or synthetic rubber may be used.

The term resins as used contemplates water-soluble resin soaps and includes, among other species, copals and the resin gums commonly known as varnish gums. Of the resins, I have found that rosin or colophony may be advantageously used in my composition.

One of the useful properties of my com position resides in the flexibility given to the resin by the rubber constituent.

The aqueous dispersions of the resins may be accomplished by saponification, sulphonation or otherwise. A preferable method of saponifying resin is to subject it to the action of an alkali, preferably sodium carbonate,

the presence of water and heat, using, for example, 15 parts by weight of sodium car bonate to parts of resin and from 200 to 400 parts of water, care being taken that the heat is not so great as to cause excessive boiling of the resin which may result in the resin, or a portion thereof,escaping from its container. .To assist in the dispersion oils may be used and the resins dissolved therein and then aqueously dispersed or they may be made water soluble by sulphonation.

For certain uses hydrophilic colloids'f, such as starches, glues, soluble silicates, casein or casein solutions, or colloidal clays may be advantageously'added to the resinjand r'ubher. It will also be understood that vulcanizing agents and/or accelerating agentsv and/or insolubilizing agents, e. g. formalde- Application filed June 30,

plowing 1926. serial. 119,758.

hyde and potassium chromateamayabe used in carrying out my invention and that colormg agents and fillers may also be employed when desirable. v After my composition has been made, the

water present'therein may be removed by evaporation or by any dehydrating agent coagulant. I

My composition may be applied in any the resin and the rubber may be advantageously used at times. In the making of pa'- per, after my, composition of resin and rubber in aqueous dispersion has been mixed 'withthe paper stock in the vat or other container, the coagulating agent may be added thereto as such as alcohol, the latter also acting asa may also, if desired, the vulcanizing agent.

As one example of my composition which is adaptable for use as a beatersize for paper or likematerialin which considerable flexi- 3 bility is a necessary property, I give Rubber in aqueous dispersion (approximately 35% rubber content) 30 rosin content Saponified rosin (approximately 25% rosin content) Casein solution (approximately 20% ca-'v sein content)e '20 the fol- 'Parts 1 weight Parts by I Another example of a beater size for paper is" or like material of the finer grades and be of the following com- As an example of an embodiment of my composition suitable for-use asja surface size or coating for paper, textiles, fabrics! and like materials, l have found the followmg adaptable: PM by weight Rubber in aqueous dispersion (approximately %.-rubber content) 100 Saponified rosin (approximately 25% rosin content); 100 Colloidal clay 50 Satin white.... l 25 For some uses of my invention, for example when it is to be used as a surface size or coating and a velvety feel is desired, suitable quantities of parafiine, preferably dissolved in oil, or oils, such as heavy petroleum, semi-drying, or oxidizing oils may be advantageously incorporatedin the composition.

While I have herein described some particular compositions embodying my' invention and. methods of producing the same and also mentioned some of the arts in which my inventionmay be utilized, it is to be understood that the invention is not limited to those arts or to the precise methods, ingredients orprpfortions mentioned.

aving thus described my invention, I

' claim and desire to protect by Letters Patent of the United States 1, A composition comprising a'water soluble resin soap, an alkali, rubber latex in aqueous dispersion and casein in solution,

2. A composition comprising a water soluble resin soap having an alkaline metallic base, rubber latex, casein, vent, in aqueous dispersion. 3. A composition ofmatter in a ueous dispersion substantially comprisingt e followmg".

Parts by weight Rubber in aqueous dispersion (approximately 35% rubber content) Saponified; rosin (approximately 25% rosin content) 40 Casein solution (approximately 20% casein content) 20 '4. A composition comprising a water-sol-uble resin soap made by using anon-volatile alkali, rubber latex and a non-resinous hydrophlic colloid in aqueous In witness whereof I..have hereunto set dispersion.

my hand this 29th day of June, 1926.

- A BIDDLE.

and a casein sol- 

